package com.nowcoder.community.entity;/**
 * @description:
 * @Author HP
 * @create 2021/12/13 13:17
 */

/**
 * @author HP
 * @create 2021-12-13 13:17
 * @desc 封装分页的相关信息
 **/
public class Page {
    //当前页码,默认为1
    private int currentPage=1;
    //显示上限
    private int limit=10;
    //数据总数，用于计算总页数
    private int rows;
    //查询路径，用于复用分页链接
    private String path;

    public int getCurrentPage() {
        return currentPage;
    }

    public void setCurrentPage(int currentPage) {
        if (currentPage>=1){
            this.currentPage = currentPage;
        }
    }

    public int getLimit() {
        return limit;
    }

    public void setLimit(int limit) {
        if (limit>=1 && limit<=100){
            this.limit = limit;
        }
    }

    public int getRows() {
        return rows;
    }

    public void setRows(int rows) {
        if (rows>=0){
            this.rows = rows;
        }
    }

    public String getPath() {
        return path;
    }

    public void setPath(String path) {
        this.path = path;
    }

    /**
     * 获得当前页的起始行
     */
    public int getOffset(){
        return (currentPage-1)*limit;
    }
    /**
     * 获取总页数
     */
    public int getTotal(){
        if(rows % limit == 0){
            return rows/limit;
        }else{
            return rows/limit+1;
        }
    }
    /**
     * 获取起始页码
     */
    public int getFrom(){
        int from=currentPage-2;
        return from<1?1:from;
    }
    /**
     * 获取终止页码
     */
    public int getTo(){
        int to=currentPage+2;
        int total=getTotal();
        return to>total?total:to;
    }
}
